Scaffold



United States Patent Int. Cl. E04g N06 US. Cl. 52638 ABSTRACT OF THEDISCLOSURE A scaffold made up of spaced scaffold sections. Each saidscaffold section being made up of spaced vertically extending channelswith channel legs extending outward from each other. A splice channel isattached to each vertically extending channel and it extends above theupper end of the vertical channel. A laterally extending plank supportis attached to each splice channel and the plank support holds the twosplice channels together to form a rigid scaffold section. The lowerends of each vertical channel have a frame lock on it. When one scaffoldsection is stacked upon another, the frame lock on each vertical legextends through a hole in a said plank support. The frame locks eachhave a locking means on their lower end. Adjustable Outriggers areprovided. These outriggers each have a specific sliding connectionbetween them and one of the vertical channels. A winch is attached to avertical channel above each outrigger so that the outrigger can belifted up and down. An improved locking means including a blade and aspring prevents the outrigger from sliding down.

This invention relates to scaffolds and, more particularly, to scaffoldsfor use by bricklayers, masons and other persons in the building trade.

The scaffold disclosed herein is made up of sections that can beconnected together in spaced relation by means of brace bars. Thesections can be stacked one on top of the other and adjustableoutriggers are connected to the vertical legs of the sections and theseOutriggers can support planks to carry building materials, such asbricks, and bricklayers.

It is an object of the invention to provide an improved scaffold.

Another object of the invention is to provide an improved scaffold thathas facilities especially suitable for use by bricklayers.

Another object of the invention is to provide a scaffold for use inbuilding trades which is simple in construction, economical tomanufacture, and simple and efficient to use.

With the above and other objects in view, the present invention consistsof the combination and arrangement of parts hereinafter more fullydescribed, illustrated in the accompanying drawings and moreparticularly pointed out in the appended claims, it being understoodthat changes may be made in the form, size, proportions, and minordetails of construction without departing from the spirit or sacrificingany of the advantages of the invention.

In the drawings:

FIG. 1 is an enlarged partial view of one of the vertical legs of thescaffold showing the adjustable outrigger supported thereon;

FIG. 2 is a partial top view of the part of the invention shown in FIG.1;

FIG. 3 is an enlarged view of the flipper lock according to theinvention;

FIG. 4 is a view of one of the sections of the scaffold;

FIG. 5 is an enlarged view of a joint where one vertical leg rests onanother as when two scaffold sections 9 Claims "ice are stacked; FIG. 8is a similar view of another embodiment;

FIG. 6 shows the scaffold sections in stacked relation and connectedtogether by brace bars; and

FIG. 7 is an enlarged top view of one of the vertical channels similarto FIG. 1.

Now with more particular reference to the drawings, FIG. 4 shows onesection of the scaffold which may be considered an end frame 10. Eachend frame includes the vertical channel legs 22 which are connectedtogether at their upper ends by the top plank support 23. The upper endof each vertical leg channel 22 is welded to a splice channel 29 and thesplice channel extends above the upper end of the vertical leg channelas indicated. The top plank supports 23 are welded at their outer endsto the splice channels 29 and thus they hold the vertical legs together.The vertical legs at one side have the braces 18 welded to them at theirlower end and the braces 18 are welded to the upper plank supports attheir upper end and intermediate plank supports 15 are welded to thesplice channels 29 and to the braces 19 at their other end. Additionalplank supports 13 and 14 are welded to one leg 22 and braces 20 arewelded to the vertical leg channel and to plank support 14, as shown.

When the scaffold sections are stacked, the lower end of an upperchannel vertical legs 22 rests on the upper end of a vertical channelbelow it at 24 as best shown in FIGS. 4, 5, and 6. The scaffold framelocks 21 are welded to the lower ends of the vertical legs 22 and thescaffold frame locks 21 extend through holes 30 in plank supports 23. Alatch 26 is pivoted to the lower end of each scaffold frame lock 21 andit can extend through the holes 30 and it will swing out to the positionshown in FIG. 5 so that it would underlie the plank support 23 andprevent the upper section of scaffold from inadvertedly separating fromthe lower section of the scaffold when in use.

The adjustable Outriggers 16 are shown in FIGS. 1, 4 and 6. TheOutriggers have the plank support 27 welded to the channel 32. Thechannel 32 has the space bolts 33 extending through it and through theback plate 34. Washers 60 hold the back plate space from the channel 32.The vertical legs 22 are in the form of channels that have channel legs46 and 47 and these channel legs have inwardly extending flanges 48 and49. These flanges 48 and 49 terminate in inwardly extending ends thatengage the back plate 34 and guide it in its up and down slidingmovement.

Winches 17 may be fixed to the vertical channels above the outrigger 16and the winches may be connected to the eye bolts 39 to lift theOutriggers.

A spring 40 is received on the eye bolt 39 and the lower end of the eyebolt has a nut 41 on it holding it in place in the plank support 27. Aflapper lock 37 extends above the channel 32 and has a hole 42 throughwhich the bolt 39 extends. The flapper lock has two spaced notches 50which receive the flanges 48 and 49 and the flapper lock has sharpenededges 51 that will frictionally engage the flanges 48 and 49 to preventthe outrigger from sliding downward.

It will be noted that when the outrigger tends to slide downward, theforce of the spring 40 urged by the weight of the outrigger will causethe sharpened edges 51 (FIG. 3), to engage the flanges 48 and 49 andthereby prevent the outrigger from sliding downward.

The plank support 27 has the plank support lock guard plate 35 weldedonto it that prevents the planks used by the bricklayer from sliding toofar in to engage and interfere with the locks.

The brace rods 52 have holes in their opposite ends which receive thestuds 54. The studs 54 have a latch 55 3 pivotally attached to the endthereof that are forced downward by the force of gravity and theyprevent the brace rods from sliding off of the studs.

FIG. 2 shows a second channel 63 that is bolted to the top plank support23 by means of bolts 64 having nuts 65 thereon. Thus, a second outriggersuch as Outriggers having plank supports 27 can be supported across theend of the scaffold sections in addition to the Outriggers extendinglaterally as shown in FIGS. 4 and 6. This makes it possible to form ascaffold in an inside corner of a wall with scaffold boards extendingalong both walls forming the corner.

In the embodiment of the invention shown in FIG. 8, an alternativelocking device for the lock 21 shown in FIG. 5, is shown. The lock isshown on a scaffold with vertical legs 122 and plank supports 123. Thelock tube 143 is welded to the spacer 142 and a hooked rod 126 extendsthrough the tube 143 and has a spring 140 on it on its upper end whichbears against the flange 141 on the end of the straight part of thehooked rod 126. The hooked rod 126 can extend down through a slot 130and it can be rotated after it is inserted so that its short end abutsagainst the lower side of the plank support 123.

The foregoing specification sets forth the invention in its preferredpractical forms but the structure shown is capable of modificationwithin a range of equivalents without departing from the invention whichis to be understood is broadly novel as its commensurate with theappended claims.

The embodiments of the invention in which an exclusive property orprivilege is claimed are defined as follows:

1. A scaffold made up of two spaced channel frames comprising a pair ofspaced vertical legs,

a vertically extending outwardly facing channel comprising each saidleg,

two Outriggers, one said outrigger being supported on each said leg,

each said channel having spaced legs facing outward and a web,

two back plates, one said back plate being disposed in each saidchannel,

spaced means holding said back plates in spaced relation to each saidweb,

and means fastening said back plates to said webs,

a plank support fixed to each said channel frame and extending outwardlytherefrom,

each said vertical leg having a flange attached thereto and extendingtoward the other said channel frame lags,

a said back plate being disposed between each pair of the said channelframe legs,

said flanges being disposed between said back plates and said Webs,

and means for locking said Outriggers in position on said vertical legwhereby said outrigger can be adjusted vertically.

2. The scaffold recited in claim 1 wherein said means to lock saidoutrigger in position comprises a flapper-like plate-like member,

said plate-like member being disposed generally parallel to said planksupport,

said plate-like member extending into the space between said legs ofsaid vertical legs,

said plate-like members being wider than the space between said flanges,j notches in said plate-like rn'ember receiving said flanges.

3. The scaffold recited in claim 2 wherein said platelike member isattached to said outrigger by means of a bolt,

4 said bolt extending through a hole in said plate-like member and intosaid plank support.

4. The scaffold recited in claim 3 wherein said bolt has an eye at theupper end thereof,

a chain attached to said eye,

and means for attaching said eye to a said vertical leg.

5. The scaffold recited in claim 4 wherein a winch is attached to a saidvertical leg,

and said winch has a cable thereon,

and means to connect said cable to said eye bolt.

6. The scaffold recited in claim 5 wherein each said vertical leg is apart of a scaffold frame,

and each said scaffold frame comprises two spaced said vertical legs,

and intermediate plan supports vertical legs in spaced pairs,

said intermediate plank supports being disposed generally parallel tosaid plank supports on said outriggers.

7. A scaffold comprising spaced scaffold frames,

each said scaffold frame comprising spaced vertically extending channelshaving channel legs extending away from each other,

a plank support connected to the upper end of each said vertical channelconnecting two said vertical channels together to form a frame,

a hole in the top of each end of said plank support adjacent each saidvertical channel,

and a frame lock attached to the lower end of each said leg,

the lower end of each said leg of one scaffold resting on thecorresponding leg of scaffold section below it,

and a latch member swingably attached to said frame lock at the lowerend thereof and adapted to swing out of alignment with said frame lockin an end of said latch underlying said plank support.

8. The scaffold recited in claim 7 wherein each said vertical channelhas a splice channel attached to it on the inner side thereof,

said Splice channel extending above the upper end of said verticalchannel,

said plank support being fixed to said vertical channel by means of saidsplice channel,

said scaffold section being adapted to be stacked with the lower end ofthe legs of a scaffold section resting on the upper ends of the verticalchannel below it.

9. The scaffold recited in claim 8 wherein a plurality of brace studsare fixed to said vertical channels,

and brace bars are provided each having a hole in each opposite end,

said holes in said brace bars receiving said studs,

and means on the ends of said studs for retaining said brace barsthereon.

connecting said References Cited UNITED STATES PATENTS 2,290,535 7/1942Cavins 182-l79 2,892,661 6/1959 French 1821l9 3,245,188 4/1966 Evans52-638 3,396,817 8/1968 Perry 182-119 FOREIGN PATENTS 653,953 5/1951Great Britain.

REINALDO P. MACHADO, Primary Examiner US. Cl. X.R. 1s2 17s; 24s 243

